Flotjbistg-mill



UNTTED STATES PATENT OFFICE.

EDWIN CLARK, OF LANCASTER, PENNSYLVANIA.

FLGURING-IVIILL.

Specification of Letters Patent No. 20,329, dated May 25, 1858-; Antedated February 2, 1858'.

To all 'whom it may concern:

Be it known that I, EDWIN CLARK, of Lancaster, in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in the Bolting Apparatus of Flouring-Mills; and I do hereby declare the following to be a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, making a part of this specification, in which-- Figure l, represents a front elevation of the bolting apparatus, Fig. 2, represents a vertical longitudinal siection through the same, Fig. 3, represents a vertical cross section, Figs. 4 and 5, represent detached portions of the apparatus, not distinctly7 seen in the other iigures.

Similar letters of reference where they occur in the several figures denote like parts of the apparatus in all of them.

The nature of my invention relates to the more perfect separation of the different qualities of the ground material, which may -be afterward mixed to suit the operator, or

consumer; or may be rebolted, or reground and rebolted, and again separated, may be required.

To enable others skilled in the art to make and use my invention, I Will proceed to descr-ibe the same with reference to the drawings. n

A, is a conveyer in front of the boltmg chamber, into which the ground material from the mill is introduced. This conveyer is open at its top, so as to cool the flour by exposure to the air, and also for the purpose of receiving and returning such portions of the material as are to be rebolted, as will be hereafter explained. The flour is delivered from this conveyer A, into the trunk B, in which works an elevator of the usual well known construction, that carries up the flour to and delivers itinto a spout C, that conducts it into the end of the bolt D. The conveyer E, underneath the bolt, receives the Hour that falls from the bolt; and the dierent qualities of extra, and superfme flour,

are carried forward and discharged by thislv conveyer, through apertures in the bottom of the conveyer box--which apertures are provided with slides or covers l, 2, 3, 4, 5, Fig. 2. The tine flour, middlings, and oifal, fall upon the supplemental bottom F, which is of a circular form, and it is carried up on said circular bottom or-divisiou by means of vanes a, a on the bolt- D, and is discharged through its appropriate openings, or returned to the conveyer E as the particular qualities to be made may require.

Under that end of the bolt D, where the circular bottom F, is placed, are arranged in succession the several sliding perforated valves Z), Z), o, Z), each having an opening c through them, which make said valves applicable to the delivery of the separated material at the openings d, e, or, cause it to be returned to the conveyer E, whence it is carried to the stones to be reground. lhen the opening c, in the valve b, is opposite the opening (Z in the bolting chamber, the separated flour will pass out of (Z, and fall onto the spout or inclined board G, and thence into any proper receptacle. IVhen said opening c, is opposite the opening c in the bolting chamber th-e material will pass through c, and fall into the conveyer box (A), and be carried by said conveyer back to the trunk B, and thence to the bolt D, to be rebolted. Then the said opening c, is arranged as seen in Fig. 3, between the openings (I, e, then the material passes into the other conveyer E, and is by it returned to the stones to be reground, so that whether the flour or ground material be of proper quality to be taken from the bolt, or is of such quality as to require either to be rebolted, or reground and rebolted, a simple settting of the perforated valve b, accomplishes either result, and the exact point at which the several qualities may be divided so as to take them to their respective places, may, and can be designated by the series of valves represented.

Between the valves o, are divisions f, which have grooves cut in them, into which said valves slide; and over these divisions f, and between them and the circular bot-tom and division, are also placed inclined planes 2', (double or single), for the purpose of conducting that portion of the tine flour and middlings which fall upon the said spaces, into the apertures in the valves, and thus prevent the different qualities that may be discharged at each special valve from commingling, the object being to make a perfect separation, and keep the qualities separate, unless desired to be mixed, which can be done, but every separation, or delivery, or

mixing, is positive and under the control of the operator, and not subject to run one into the other without his ability to control it.

Rods or wires n, are attached to the valves 7J, which may have notches in them, to catch over or on a point or projection on the frame (as seen in Fig. 3) to hold them at their properly adjusted places for the special purpose to which they are to be applied, whether to deliver the material lout of the bolting charged through one of the apertures d, e,

in the bolting chamber, or conducted by the valves and the inclined bottom of the boltingchamber into the conveyer E. VVhatever quality of fine flourmiddlings, or ofl'al, is to be run ottl is discharged through the apertures cl, and conveyed by the inclined board Gr, into any proper receptacle. lVhatever quality of the fine flour, or middlings, that is to be rebolted is discharged through the apertures e, and falls into the conveyer A; and that which is to be reground is conveyed into the conveyer E-the valves b, Z), &c., being adjusted for either one of these object-s, as described-that is to make or break vthe communicating passage to either, and thus any quality may be separated and run off, and any quality may be rebolted without regrinding, or reground and re- Vbolted both, giving the miller all they facili-V ties for making such qualities f flour as may be required, either by distinct separations, or by the mixing of the separated qualities, and this too without allowing one grade of flour to mix with another unless so desired. Y Y

As I believe myself to be the first to in troduoe the inclined plane or planes between the divisions f, so as to conduct each special quality to its special transit through or out of the boltin machine, without allowing the different qua ities to .mix or run one into the other, Ishould consider the substitution of their perforations c, in combination with the Y apertures (13,6, in the bolting chamber, so as to lnake said valves common to the three different transits of the ground materia-l substantially as described.

2.' I also claim in combination with the circular division F, the inclined planes z', for properly conducting that portion of the material that falls upon the space between them, into its proper channel as set forth.

. EDWIN CLARK.

lVitnesses WILLIAM FRIoK, JAMES CoLvIN. 

